linux-kernel - Re: [patch V4 05/21] irqchip/gic-v3-its: Provide MSI parent for PCI/MSI[-X]

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Message-ID: <ZoErdNIuRYD3oEww@arm.com>
Date: Sun, 30 Jun 2024 10:55:00 +0100
From: Catalin Marinas <catalin.marinas@....com>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: Marc Zyngier <maz@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
	linux-arm-kernel@...ts.infradead.org, linux-pci@...r.kernel.org,
	anna-maria@...utronix.de, shawnguo@...nel.org,
	s.hauer@...gutronix.de, festevam@...il.com, bhelgaas@...gle.com,
	rdunlap@...radead.org, vidyas@...dia.com,
	ilpo.jarvinen@...ux.intel.com, apatel@...tanamicro.com,
	kevin.tian@...el.com, nipun.gupta@....com, den@...inux.co.jp,
	andrew@...n.ch, gregory.clement@...tlin.com,
	sebastian.hesselbarth@...il.com, gregkh@...uxfoundation.org,
	rafael@...nel.org, alex.williamson@...hat.com, will@...nel.org,
	lorenzo.pieralisi@....com, jgg@...lanox.com,
	ammarfaizi2@...weeb.org, robin.murphy@....com,
	lpieralisi@...nel.org, nm@...com, kristo@...nel.org,
	vkoul@...nel.org, okaya@...nel.org, agross@...nel.org,
	andersson@...nel.org, mark.rutland@....com,
	shameerali.kolothum.thodi@...wei.com, yuzenghui@...wei.com,
	shivamurthy.shastri@...utronix.de, Rob Herring <robh@...nel.org>
Subject: Re: [patch V4 05/21] irqchip/gic-v3-its: Provide MSI parent for
 PCI/MSI[-X]

On Sat, Jun 29, 2024 at 09:51:08PM +0200, Thomas Gleixner wrote:
> On Sat, Jun 29 2024 at 12:44, Thomas Gleixner wrote:
> >> With this hack, I can boot a GICv3+ITS guest as usual.
> >
> > It's not a hack. It's the proper solution. Let me fold that back and
> > look at the other PCI conversions which probably have the same issue.
> >
> > Thanks for digging into this. This help is truly welcome right now.
> 
> So while I pondered to do it slightly differently for a moment I went
> back to this approach and fixed up the other affected ones too. Full
> delta vs. devmsi-arm-v4-1 below.
> 
> Updated branch:
> 
>    git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git devmsi-arm-v4-2

This seems to work for me as well. I re-added this branch to arm64
for-kernelci for wider exposure.

Thanks.

-- 
Catalin